A greeting card includes a substrate sheet having indicia printed thereon with a first ink readable under visible light and having indicia printed thereon with a second ink visible under ultraviolet light. An ultraviolet light emitting diode flashlight emitting a wavelength under which the second ink is visible is secured to the substrate. The ultraviolet light emitting diode is secured to the greeting card substrate by way of a flap extending therefrom or through the use of a hook and loop fastener. A commercial package including such a greeting card also has therewith a pen having an ink visible under illumination from the ultraviolet light emitting diode flashlight.